My observations mirror engineer's. Most of the bikes I encounter when out on the road in my locale are cruisers, mostly Harleys. Sportbikes are a (very) distant second, Third is a mix of other types.
A lot of my local riding takes me in the vicinity of two very large university campuses and that's where I see most of the sport bikes, The riders are almost always wearing backpacks to carry their stuff.
I've never witnessed any of the hooliganism like in the videos though.
Two summers ago I rode down to Pittsburgh International raceway for the MotoAmerica road races. I expected the motorcycle parking area to be filled with sportbikes. Nope. There were quite a few, but of the many hundreds of bikes there, the majority were cruisers, big touring bikes and adventure bikes. I've never seen so many big ADV bikes in one place before. I'm pretty sure that my S40 was the only one in the lot. Possibly the smallest bike there too
Another personal anecdote for what it's worth. When I bought my Sportster a few years ago from a local dealership's used inventory, the salesman told me that the young fellow that traded it in had traded it in on a brand new Kawasaki Ninja 300. Wanted a bike to commute back and forth to work, and wasn't happy with the Sportster in that role.